Heat Exchanger Brazing Layout to Prevent Member Misalignment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Heat exchangers manufactured using furnace brazing often experience member misalignment due to load application during assembly, leading to shifted positions of fins, heat transfer pipes, and headers during the brazing process.
Innovation Solution
A heat exchanger manufacturing method where the protruding length of fins from heat transfer pipes and the distance from heat transfer pipes to headers are set equal, allowing for uniform contact and minimizing inclination during furnace brazing, ensuring each member remains in its original position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If furnace brazing is performed with heat exchanger members temporarily assembled on a conveyer, then the manufacturing process can be completed, but the fins, heat transfer pipes, or headers are brazed in a state shifted from original positions due to load application
Solution Approach 1:
The protruding lengths of fins and distances from heat transfer pipes to headers are set equal in advance before brazing. This preliminary dimensional configuration ensures uniform contact with the conveyer surface, preventing position shifts during the brazing process and maintaining manufacturing precision while enabling continuous production
2Stability of the object's composition
If the protruding length of fins and distance to headers are set equal, then uniform contact is achieved and position stability is improved, but additional assembly steps are required
Solution Approach 1:
The invention changes the dimensional parameters of the heat exchanger components by setting the protruding length of fins and the distance from heat transfer pipes to headers to be equal. This parameter adjustment enables uniform contact with the conveyer surface, improving position stability during brazing while the modular design keeps the assembly process manageable
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method reduces deformation and clearance issues, enhancing assemblability and maintaining performance by maintaining the original position of heat exchanger components during brazing.
Implementation Method 1
conveying the assembled member into a furnace by the conveyer to heat the assembled member, thereby performing brazing of the assembled member
Data Source
Figure 1(a)~1(b)
Figure 2~3(c)
Figure 4~5
AI summary
A heat exchanger includes fins (2), heat transfer pipes (3), and headers (4). These members are joined to each other by brazing. The fins (2), the heat transfer pipes (3), and the headers (4) are assembled and placed on a conveyer (101) with longitudinal directions of the headers (4) and the fins (2) being a horizontal direction. In this state, the protruding length Tf of the fin (2) from the heat transfer pipe (3) and a distance Th from the heat transfer pipe (3) to an outer surface of the header (4) on the same side as the protrusion are substantially equal to each other.